def download_facebook_video(url, output_dir="downloads"): """ Download and repack a Facebook video using yt-dlp as backend. yt-dlp handles the manifest parsing, segment fetching, and repacking automatically. """ if not os.path.exists(output_dir): os.makedirs(output_dir)
if result.returncode == 0: print(f"[✓] Repack completed. File saved to output_template") print(result.stdout) else: print(f"[✗] Error: result.stderr") sys.exit(1) if == " main ": if len(sys.argv) < 2: print("Usage: python fb_downloader.py <facebook_video_url>") sys.exit(1) download_facebook_video(sys.argv[1])
Note: Facebook frequently shuffles its JSON keys. This method requires constant updates. The real power of a script is automation. Here's how to modify the script to process multiple URLs from a text file:
| Tool | Purpose | |------|---------| | | Main scripting language | | Requests | HTTP library to fetch pages | | BeautifulSoup4 | Parse HTML | | re (regex) | Extract hd_src URLs from JS | | FFmpeg | Repack video/audio and convert | | youtube-dl / yt-dlp | Backend engine (the easiest shortcut) | Note: The most efficient "script download Facebook video repack" solution today leverages yt-dlp , a command-line tool that already reverse-engineered Facebook. Part 4: Ready-to-Use Script Example (Python + yt-dlp) Below is a production-ready script that performs the complete repack operation. Save it as fb_downloader.py .
